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RFC 1700 - ipv4-address-space

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    INTERNET PROTOCOL ADDRESS SPACE

    The allocation of Internet Protocol version 4 (IPv4) address space to
    various registries is listed here.  Originally, all the IPv4 address
    spaces was managed directly by the IANA.  Later parts of the address
    space were allocated to various other registries to manage for
    particular purposes or regional areas of the world.  RFC 1466
    documents most of these allocations.

    Address Block	Registry - Purpose			Date
    --------------- --------------------------------------- ------
    000-063/8	IANA					Sep 81
    064-095/8	IANA - Reserved				Sep 81
    096-126/8	IANA - Reserved				Sep 81
    127/8		IANA					Sep 81
    128-191/8	Various Registries 			May 93
    192-193/8	Various Registries - MultiRegional	May 93
    194-195/8	RIPE NCC - Europe			May 93
    196-197/8	Internic - Others			May 93
    198-199/8	Internic - Central and South America	May 93
    200-201/8	APNIC - Pacific Rim			May 93
    204-205/8	Internic - North America 		Mar 94
    206/8		Internic - North America 		Apr 95
    207/8		Internic - North America 		Nov 95
    208-223/8       IANA - Reserved				Sep 81
    224-239/8	IANA - Multicast			Sep 81
    240-255/8	IANA - Reserved				Sep 81

    []

Connected: An Internet Encyclopedia
RFC 1700 - ipv4-address-space